Lighting fixture support



FIG. 1 is a perspective view from above of a lighting fixture support in accordance with my design, shown in its environment;

FIG. 2 is a perspective view from below of the lighting fixture support in accordance with my design, shown in its environment;

FIG. 3 is a side elevation view of the lighting fixture support in accordance with my design, shown in its environment;

FIG. 4 is a front elevation view of the lighting fixture support in accordance with my design, shown in its environment;

FIG. 5 is a bottom plan view of the lighting fixture support in accordance with my design, shown in its environment; and,

FIG. 6 is a top plan view of the lighting fixture support in accordance with my design, shown in its environment.

The broken lines showing environmental structure are for illustrative purposes and form no part of the claimed design. 

The ornamental design for the lighting fixture support, as shown and described. 